Hello Deltabrat,
I know what you mean when it comes to those acronyms . I always find myself sitting here trying to figure them out . One (and notice I said One )that I am familiar with (thanks to Salience ) is ROFL/ROTFL is "Rolling on (the) floor laughing".
Hope this helps, and I will keep checking this thread with hopes of learning more of these acronyms.
Have a good day & God Bless!
. I always find myself sitting here trying to figure them out 
. One (and notice I said One 
)that I am familiar with (thanks to Salience 
) is ROFL/ROTFL is "Rolling on (the) floor laughing".
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